Definition The outdoor-air ratio (OAR) is the share of supply air that is genuinely fresh outdoor air: OAR = outdoor_air_flow / total_supply_air_flow A space with no recirculation runs at OAR = 1 (100% outside air). Where OAR is forced to 1 Some spaces cannot recirculate for safety or code reasons: Cleanrooms and graded pharmaceutical suites […]
Commercial Kitchen Heat Recovery
Commercial kitchens run powerful hoods that throw away large amounts of hot, greasy air. Replacing it with conditioned make-up air is a major cost. Kitchen heat recovery captures the sensible heat while keeping grease and smoke out of the supply. Why Separation Matters in Kitchens Exhaust carries grease aerosol and odors, so any recovery device […]